<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
	</head>
	<body>
	</body>
</html>
<script>
	var arr1=new Array("北京","上海","广州");
	var arr2=new Array("天津");
	var arr3 = arr1.concat(arr2);
	console.log(arr3);
	
	console.log(arr3.push("重庆","海南"));
	console.log(arr3);
	
	console.log(arr3.pop("海南"));
	console.log(arr3);
	
	console.log(arr3.splice(2,1));
	console.log(arr3);
</script>